Corrosion of organosilane coated Mg4Y alloy in sodium chloride solution evaluated by impedance spectroscopy and pH changes
By Doepke, Amos; Xue, Dingchuan; Yun, Yeoheung; Vanooij, William J.; Halsall, H. Brian & Heineman, William R.
Published in Electrochimica Acta
NULL
2012
Abstract
Electrochemical impedance spectroscopy (EIS), open circuit potential and pH changes were used to examine the corrosion of magnesium 4% yttrium alloy (Mg4Y) with and without a silane-epoxy-coating (SEC) in a stirred 0.154 M NaCl solution at 37 °C. For a good quality SEC we find a relatively low non-Faradaic resistance of 266 Ω cm2. The quality of the SEC was affected by the curing temperature. In this article we compare the electrochemical measurements taken during corrosion of bare Mg4Y, Mg4Y with a SEC that remained intact, and a SEC that did not protect the Mg from corrosion.
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